In the first mission "D-Day" , Daniels goes to great lengths to save his friend Robert Zussman, who got wounded in a stab attack by a German Soldier. Thankfully, Zussman manages to recover from the wound.
In the sixth mission "Collateral Damage", Daniels and his team find a group of German Civilians hiding in a bunker. Lieutenant Turner convinces Sergeant Pierson of his plan to lead the group to safety far from the warzone they're hiding in.
In the tenth mission "Ambush", after Daniels fails to save Zussman from capture, he is comforted by Stiles and Aiello who tell him that it isn't his fault.
Aiello has been an ass towards Howard ever since he meets him due to his racist views. Few months of fighting together and after the US takeover the Rhine, Aiello finally apologizes for his behaviour towards him.
Since Daniels is fully voice and is given a defined personality unlike most COD protagonist who are usually Heroic Mime, the player can see how Daniels interact with his fellow brother in arms aside from the lead characters. In the opening Death Factory, he helps the camp cook to deliver food to Willis, a soldier on look out. Take note that this is consider a primary mission in order for the level to continue.
